Hall plateau and spin splitting effect in
Phys. Rev. B 114, 125125 – Published 24 August, 2026
DOI: https://doi.org/10.1103/stvb-gpnv
Abstract
The exotic electronic structure of materials usually hosts emergent quantum states and unconventional transport behaviors, which not only advance our understanding of fundamental physics but also offer promise for future technological applications. In the topological system , the observed nonlinear field-dependent Hall resistivity exhibits a pronounced plateau in the absence of magnetic ordering. Through detailed analysis, we develop a four-band model to understand this behavior, rather than attributing it to an anomalous Hall effect or a nontrivial topological mechanism. Angle-dependent quantum oscillation measurements, combined with density functional theory calculations, reveal multiple intricately shaped Fermi surfaces which contribute to anisotropic magnetoresistance driven by distinct scattering rates across different Fermi sheets. Under high magnetic fields, a significant spin splitting emerges, exhibiting strong angular dependence. Our results demonstrate that in a nontrivial topological system the intrinsic complexity of the electronic structure can give rise to exotic transport phenomena predominantly governed by the Lorentz force.
